<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>

    <div id="app">
      分数：{{point}}
      <br />
      <button @click="add(2,$event)">add+2</button><br />
      <but @click.native="add(3)"></but>
    </div>
    <button onclick="app.add(4)">构造器外部ADD+4</button>

    <script>
      var but = {
        template: `<button>组件ADD+3</button>`,
      };
      var app = new Vue({
        el: "#app",
        data: {
          point: 10,
        },
        methods: {
          add: function (num, event) {
            this.point += num;
            console.log(event);
          },
        },
        // 挂载
        components: {
          but: but,
        },
      });
    </script>
  </body>
</html>
